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Income-tax Act 2025 Advance Tax — Quarterly Installment Engine

Advance Tax & Section 234A/B/C Calculator

Calculate your quarterly advance tax installments and total advance tax liability for FY 2026-27 under the Income-tax Act 2025, factoring in TDS credit already available and the statutory 15%/45%/75%/100% cumulative schedule.

Sections 208, 209, 211 & 234A/B/C · FY 2025-26 & 2026-27

Advance Tax & Interest Schedule

Compute quarterly liability thresholds, interest under Section 234C for deferred installments, and 234B for default in payment.

Estimated Net Tax₹2,00,000
Advance Tax Paid₹0
Total Statutory Interest₹10,100
Grand Total Payable₹2,10,100

1. Tax Liability & Regime

₹2,00,000
Applicable if net tax payable is ₹10,000 or more (Sec 208).
From 1st April
Beyond return due date

2. Actual Tax Payments Deposited

Challan 280 (Code 100)

Statutory Quarter-by-Quarter Schedule u/s 211 & 234C

Quarterly targets, buffers (12%, 36%, 75%, 100%), shortfall amounts, and 1% per month interest.

QuarterStatutory Due DateRequired Target %Cumulative TargetCumulative PaidShortfallMonthsSec 234C Interest
Q115 June15% (Min 12%)₹30,000₹0₹30,0003 mo₹900
Q215 September45% (Min 36%)₹90,000₹0₹90,0003 mo₹2,700
Q315 December75% (Min 75%)₹1,50,000₹0₹1,50,0003 mo₹4,500
Q415 March100% (Min 100%)₹2,00,000₹0₹2,00,0001 mo₹2,000
Total Section 234C Interest:₹10,100
Section 234B: Default in PaymentApplicable

Charged @ 1% p.m. from 1st April if advance tax paid before 31 March is below 90% of assessed tax (₹1,80,000).

Interest Payable (0 months):₹0
Section 234A: Delay in Filing ITRCompliant

Charged @ 1% p.m. on unpaid self-assessment tax from due date of return until the date of actual filing.

Statutory Compliance Rule: Any tax paid on or before 31st March of the Financial Year is treated as Advance Tax under Section 211. Interest under Section 234C applies only on quarterly deferment, whereas Section 234B applies from 1st April of the Assessment Year if total payments fall short of 90%.

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Who Must Pay Advance Tax and When

Advance tax is the 'pay-as-you-earn' scheme under which any taxpayer whose estimated tax liability for the year (after reducing TDS/TCS credit) exceeds ₹10,000 must pay tax in installments during the financial year itself, rather than as a lump sum at the time of filing the return. This applies to salaried individuals with significant other income, self-employed professionals, businesses, and companies alike — salaried employees whose entire tax is covered by employer TDS are typically exempt in practice, but the obligation technically applies if there is a shortfall.

The statutory cumulative payment schedule for non-presumptive taxpayers is: 15% of the estimated annual tax liability by 15 June, 45% (cumulative) by 15 September, 75% (cumulative) by 15 December, and 100% by 15 March of the financial year. Missing any of these checkpoints triggers interest under Section 434 (see the Section 234A/B/C Calculator) even if the annual total is eventually paid correctly.

Taxpayers who have opted for the presumptive taxation scheme for business or professional income are permitted to pay their entire advance tax liability in a single installment on or before 15 March, without needing to meet the quarterly cumulative checkpoints.

Senior citizens (age 60 or above) who do not have any income from business or profession are exempt from the advance tax payment obligation altogether — their entire tax liability can be settled through self-assessment tax at the time of filing without attracting Section 433/434 interest.

Worked Example: Quarterly Advance Tax Schedule

A self-employed professional estimates total tax liability of ₹4,00,000 for FY 2026-27, with no TDS credit expected.

Installment 1 (by 15 June) — 15%:₹60,000
Installment 2 (by 15 September) — 45% cumulative:₹1,80,000 total paid to date (further ₹1,20,000 due)
Installment 3 (by 15 December) — 75% cumulative:₹3,00,000 total paid to date (further ₹1,20,000 due)
Installment 4 (by 15 March) — 100% cumulative:₹4,00,000 total paid to date (further ₹1,00,000 due)

Frequently Asked Questions (FAQs)

At what tax liability threshold does advance tax become mandatory?

Once estimated tax payable for the year, after reducing available TDS/TCS credit, exceeds ₹10,000, the taxpayer is required to pay advance tax in installments rather than waiting to pay it all at return-filing time.

Are senior citizens required to pay advance tax?

No, senior citizens (age 60 or above) who have no income from business or profession are specifically exempt from the advance tax payment requirement and can pay their full liability as self-assessment tax when filing the return, without interest exposure.

What is the advance tax schedule for presumptive taxation taxpayers?

Taxpayers under presumptive taxation schemes for business or professional income can pay 100% of their advance tax liability in a single installment by 15 March, instead of following the quarterly 15%/45%/75%/100% cumulative schedule that applies to other taxpayers.

What happens if I underpay an advance tax installment?

Interest under Section 434 (successor to old Section 234C) is charged on the shortfall for that specific quarter, generally at 1% per month for a period of 1 to 3 months depending on which installment was missed, even if the shortfall is made good in a later installment.

Can advance tax be revised during the year if my income estimate changes?

Yes, advance tax is based on your own estimate of annual income and can be revised at each installment date — if your estimate increases mid-year, later installments should be adjusted upward to avoid a cumulative shortfall and Section 433/434 interest exposure.